[Ultimobranchial cysts in goitrous thyroids of sheep at high altitude]. / Ob ul'timobrankhial'nykh kistakh v zobno-izmenennykh shchitovidnykh zhelezakh u obets v usloviiakh vysokogor'ia.

Histomorphology of ultimobranchial cysts of thyroid glands of sheep is presented. The average incidence of cysts in sheep was 17.3%. The cysts have some characteristic features indicating their ultimobranchial origin: the presence of inhomogeneous "foamy" colloid staining positively for glycosaminoglycans, heteromorphism of the cells lining the internal surface of the cysts, and the presence of ciliary cells among them. The detection of ultimobranchial cysts in sheep with strumous thyroid glands not only extends the concept of the species appurtenance of these formations but also indicates the possibility of frequent occurrence of ultimobranchial cysts in hyperplastic processes of strumous and neoplastic nature which is of great diagnostic and prognostic significance.

[Histochemical and morphometric changes in the adrenal cortex under conditions of acute vascular insufficiency]. / Gistokhimicheskie i morfometricheskie izmeneniia v kore nadpochechnikov v usloviiakh ostroi sosudistoi nedostatochnosti.

Morphofunctional changes in the adrenal glands of 50 male cats under experimental vascular insufficiency were studied by means of morphometric, histochemical, and biochemical methods, with a preliminary investigation of the histoenzymatological profile of the adrenal glands in intact animals. A decrease in the adrenal function was revealed five hours after induced hypotony resulting from intravenous injection of arfonade. Adrenal insufficiency, particularly that of the glucocorticosteroid function, under conditions of developing vascular failure can be considered as a peculiar adaptation of the organism to preserve its viability.